Created
August 28, 2014 15:39
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SQL Named Parameter Replacement
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#!/usr/bin/env perl | |
use warnings; | |
use strict; | |
use Data::Dumper; | |
sub sql { | |
my ($sql,%data) = @_; | |
my @parameters; | |
foreach my $placeholder ($sql =~ /:([a-zA-Z_]+)/g) { | |
if (ref $data{$placeholder} eq 'ARRAY') { | |
push @parameters, map {/\d+/ ? int($_) : "'$_'"} @{$data{$placeholder}}; | |
my $expanded_placeholder = join ",", ('?') x scalar @{$data{$placeholder}}; | |
$sql =~ s/:$placeholder/$expanded_placeholder/; | |
} | |
else { | |
push @parameters, $data{$placeholder}; | |
$sql =~ s/:$placeholder/\?/; | |
} | |
} | |
return ($sql,\@parameters); | |
} | |
print Dumper sql("SELECT * FROM genome JOIN genome AS other_genomes USING (taxon_id) WHERE genome.genome = :genome AND other_genomes.genome != :genome AND genome.taxonomy LIKE :taxon AND other_genomes.taxonomy LIKE :taxon",genome=>'hs',taxon=>'%Homo%'); | |
print Dumper sql("SELECT * FROM genome JOIN genome AS other_genomes USING (taxon_id) WHERE genome.genome IN (:genome) AND other_genomes.genome NOT IN (:genome) AND genome.taxonomy LIKE :taxon AND other_genomes.taxonomy LIKE :taxon",genome=>['hs','at'],taxon=>'%Homo%'); | |
print Dumper sql("SELECT * FROM protein WHERE protein IN (:protein)",protein=>[256,'123']); |
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